Compositions – Liquid crystal compositions – Containing nonsteryl liquid crystalline compound of...
Patent
1998-01-13
1999-10-26
Wu, Shean C.
Compositions
Liquid crystal compositions
Containing nonsteryl liquid crystalline compound of...
25229963, 560 62, 560 65, C09K 1920, C09K 1930, C07C 6976
Patent
active
059722444
ABSTRACT:
A novel tolan compound of the formula (I): ##STR1## wherein A is C.sub.1-10 alkyl, C.sub.1-10 alkoxy, cyclohexyl substituted by C.sub.1-10 alkyl at 4 position, cyclohexyl substituted by C.sub.1-10 alkoxy group at 4 position or a group of the formula: ##STR2## wherein Y is hydrogen or halogen and Z is C.sub.1-10 alkyl or halogen; B is a single bond or --CO--O-- or --O--CO--; D is hydrogen, C.sub.1-10 alkyl, cyclohexyl substituted by C.sub.1-10 alkyl at 4 position; and Z represents a hydrogen atom or a halogen atom. The tolan compound can increase the N-I point, decrease the viscosity, and increase the double refractive index of a liquid crystal composition without affecting the viscosity and threshold voltage Vth, and is mutually soluble with various other liquid crystal compounds, so that the compound can be used as a constituent of a liquid crystal composition in combination with these other liquid crystal materials to improve the properties of the composition.
REFERENCES:
patent: 5656198 (1997-08-01), Naito et al.
Naito Tomijiro
Niino Katsuji
Sakamaki Yumiko
Yamamoto Kikuo
Citizen Watch Co. Ltd.
Wu Shean C.
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